GDC Events
Its ten years since I last attended GDC but in my era went to loads of vendor parties. If you wanted to see eye candy you had to bring your own. Tiny proportion of women.
A company like Microsoft wouldn't dream then of delivering such a sexist message or hire someone who's idea of marketing is so 1970s so what a backward step. If whoevers responsible for this nonsense hasn't resigned already Monday would not be too soon for he, she, or other to be terminated.
I still mostly see over 80% male at technical events but it is progress however slow. I don't think the complainants twitter messaging is very helpful however.